Sulphohalite
A valid IMA mineral species - grandfathered
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About Sulphohalite
Formula:
Na6(SO4)2FCl
Colour:
Colourless, gray, greenish yellow; colourless in transmitted light.
Lustre:
Vitreous, Greasy
Hardness:
3½
Specific Gravity:
2.489 - 2.500
Crystal System:
Isometric
Member of:
Name:
The name is derived from its composition, containing SULFur, plus Greek "hals", salt, alluding to its content of halogens. Originally described from the Searles Lake, California, USA by Hidden and MacKintosh (1888).
Type Locality:
Sulphohalite Subgroup.
Sulphohalite is an ordered double antiperovskite with the anti-elpasolite structure (Krivovichev 2008).
Sulphohalite is an ordered double antiperovskite with the anti-elpasolite structure (Krivovichev 2008).
Unique Identifiers
Mindat ID:
3824
Long-form identifier:
mindat:1:1:3824:5
IMA Classification of Sulphohalite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Na6(S6+O4)2ClF
First published:
1888
Classification of Sulphohalite
7.BD.05
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H2O
D : With only large cations
30.1.7.1
30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
30 : ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
1 : (AB)m(XO4)pZq, where m:p>2:1
26.2
26 : Sulphates with Halide
26 : Sulphates with Halide
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Slhl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Sulphohalite
Vitreous, Greasy
Transparency:
Transparent
Comment:
Luster weak.
Colour:
Colourless, gray, greenish yellow; colourless in transmitted light.
Streak:
White
Hardness:
3½ on Mohs scale
Fracture:
Conchoidal
Density:
2.489 - 2.500 g/cm3 (Measured) 2.505 g/cm3 (Calculated)
Optical Data of Sulphohalite
Type:
Isotropic
RI values:
n = 1.455(1)
Surface Relief:
High (negative)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Chemistry of Sulphohalite
Mindat Formula:
Na6(SO4)2FCl
Element Weights:
Crystallography of Sulphohalite
Crystal System:
Isometric
Class (H-M):
m3m(4/m32/m) - Hexoctahedral
Space Group:
Fm3m
Setting:
F4/m32/m
Cell Parameters:
a = 10.068(3) Å
Unit Cell V:
1,020.54 ų (Calculated from Unit Cell)
Morphology:
Crystals commonly dodecahedral; also octahedral, or with combinations of a, o and d.
Comment:
(Krivovichev, 2008).
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0018630 | Sulphohalite | Sakamoto Y (1968) The size, atomic charges, and motion of the sulfate radical of symmetry -43m in the crystal of sulfohalite, Na6ClF(SO4)2 Journal of Science of the Hiroshima University, Series A-II: Physics and Chemistry 32 101-108 | 1968 | not provided | 0 | 293 | |
| 0018057 | Sulphohalite | Watanabe T (1934) The crystal structure of sulphohalite _cod_database_code 1011182 Proceedings of the Japan Academy 10 575-577 | 1934 | 0 | 293 | ||
| 0010549 | Sulphohalite | Pabst A (1934) The crystal structure of sulphohalite Zeitschrift fur Kristallographie 89 514-517 | ![]() | 1934 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Loading XRD data...
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.56 Å | (100) |
| 2.91 Å | (80) |
| 1.779 Å | (65) |
| 2.51 Å | (60) |
| 1.939 Å | (50) |
| 3.03 Å | (40) |
| 2.249 Å | (25) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 25 : Evaporites (prebiotic) | |
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] | |
| 45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Sulphohalite
General Appearance of Type Material:
Well formed rhombic dodecahedrons with faces to 2.5 cm.
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
Evaporite deposit.
Synonyms of Sulphohalite
Other Language Names for Sulphohalite
Dutch:Sulphohaliet
German:Sulphohalit
Sulfohalit
Sulfohalit
Russian:Сульфогалит
Simplified Chinese:卤钠石
Spanish:Sulfohalita
Sulphohalita
Sulphohalita
Traditional Chinese:鹵鈉石
Relationship of Sulphohalite to other Species
Member of:
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 7.BD. | Hasanovite | KNa(MoO2)(SO4)2 |
| 7.BD. | Kennygayite | [Pb4O2(OH)2](SO4) |
| 7.BD. | Adanite | Pb2(Te4+O3)(SO4) |
| 7.BD. | Cadsulfohite | Cd2(SO4)(OH)2 |
| 7.BD. | Hyblerite | Pb4Bi2(SO4)2(CO3)O4 |
| 7.BD. | Zanelliite | PbCu9[AsO3.5(OH)0.5]2(AsO4)2(OH)9(H2O)3 |
| 7.BD. | Evanichite | Pb6Cr3+(Cr6+O4)2(SO4)(OH)7FCl |
| 7.BD.10 | Galeite | Na15(SO4)5F4Cl |
| 7.BD.10 | Schairerite | Na21(SO4)7ClF6 |
| 7.BD.15 | Kogarkoite | Na3(SO4)F |
| 7.BD.20 | Aiolosite | Na4Bi(SO4)3Cl |
| 7.BD.20 | Caracolite | Na3Pb2(SO4)3Cl |
| 7.BD.20 | Cesanite | Na3Ca2(SO4)3(OH) |
| 7.BD.25 | Burkeite | Na6(CO3)(SO4)2 |
| 7.BD.30 | Hanksite | Na22K(SO4)9(CO3)2Cl |
| 7.BD.35 | Cannonite | Bi2(SO4)O(OH)2 |
| 7.BD.40 | Lanarkite | Pb2(SO4)O |
| 7.BD.45 | Grandreefite | Pb2(SO4)F2 |
| 7.BD.50 | Itoite | Pb3Ge4+(SO4)2O2(OH)2 |
| 7.BD.55 | Chiluite | Bi3Te6+Mo6+O10.5 |
| 7.BD.60 | Hectorfloresite | Na9(SO4)4(IO3) |
| 7.BD.65 | Pseudograndreefite | Pb6(SO4)F10 |
| 7.BD.70 | Sundiusite | Pb10(SO4)O8Cl2 |
Fluorescence of Sulphohalite
Pale bluish white
Other Information
Notes:
Slowly soluble in cold water.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Sulphohalite
mindat.org URL:
https://www.mindat.org/min-3824.html
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References for Sulphohalite
Reference List:
Penfleld, S. L. (1900) Ueber die chemische Zusammensetzung des Sulfohalit. Zeitschrift für Kristallographie, 33 (1-6). 523-526 doi:10.1524/zkri.1900.33.1.523
Foshag, William F. (1933) Sulfohalite and other minerals from the Otjiwalundo salt pan, South West Africa. American Mineralogist, 18 (10) 431-434
Pabst, Adolf (1934) The Crystal Structure of Sulphohalite. Zeitschrift für Kristallographie, 89 (1-6). 514-517 doi:10.1524/zkri.1934.89.1.514
Pabst, A., Sawyer, D. L., Switzer, George (1963) Galeite and related phases in the system Na2SO4-NaF-NaCl. American Mineralogist, 48 (5-6) 485-510
Fanfani, L., Nunzi, A., Zanazzi, P. F., Zanzari, A. R., Sabelli, C. (1975) The crystal structure of schairerite and its relationship to sulphohalite. Mineralogical Magazine, 40 (310) 131-139 doi:10.1180/minmag.1975.040.310.03
Lane, M. D. (2007) Mid-infrared emission spectroscopy of sulfate and sulfate-bearing minerals. American Mineralogist, 92 (1) 1-18 doi:10.2138/am.2007.2170
Localities for Sulphohalite
Showing 6 localities.
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Antarctica | |
| Kammerer (2011) |
China | |
| Kezao Chen (1992) | |
Italy | |
| De Vecchi et al. (pp. 417-443) |
Namibia | |
| Specimen in the collection of the ... +2 other references |
Tanzania | |
| Káldos et al. (2015) |
USA (TL) | |
| Hidden (1888) +10 other references |
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The
Searles Lake, San Bernardino County, California, USA